Will brought an extra tray of 42 cookies home from his job as a caterer. 18 of them are chocolate chip. Of the rest of the cookies, half are peanut butter, and the other half are oatmeal.
Let p stand for the number of peanut butter cookies there are.
The answers are as follows:
(42+18)/2=p
2*(42-18)=p
(42-18)/2=p